And when ו Vav ascends through them, the seraphim are aroused towards it, to receive it with their wings.
It is this that is written: (Is. 6:2) Seraphim standing above it, six wings... etc. And the one who ascends upon their wings, and flies with them, is Vav ו (=6), comprising the six words of the Unity: (Deut. 6:4) Hear O Israel... And because of it, is stated: (Ecc. 10:20) For the bird of the heavens... etc.
And when Daughter ascends, She ascends through the two arms, – which are Ḥesed and Gevurah – in which there are six parts, which are the letter Vav ו (=6). And the mystery of the matter: (Song. 2:6) His left-hand is beneath my head, and his right-hand embraces me...